You can send push notification to customers that have the Astro mobile app by creating a campaign. Once on your Marketing Suite main page, click Campaigns in the bottom left-hand corner.
To create a Multi-Media Push Notification Campaign, select Template Campaign underneath Multi-Media Campaign.
From here you can either select an existing campaign, or New Template Campaign.
Once you are editing a Template Campaign, all settings for the Campaign will be on the left-hand side. Here, you will look for Communication Types.
Select Deliver Via App Notification for push notification campaigns.
In the top right corner you will see the number of recipients and number of push notifications that will go out. If you are sending solely a push notification campaign, then this number should match. However, if you are sending the campaign multiple ways such as email, and push notification, the number might be different since some people may not be receiving it via the app.